High-precision, lightweight silicon-based deformable mirrors
Overwiew
We aim to develop a new lightweight, hybrid and very fast mirror technology based on processes for manufacturing self-supporting silicon membranes with locally doped zones.
Gil MORETTO, CRAL/CNRS
Mohamed SAADAOUI, Xavier BODDAERT, EMSE
Jean-Fabien CAPSAL, David AUDIGIER, INSA-Lyon
Frederic ZAMKOTSIAN, LAM/CNRS
We will also be developing a breakthrough technology that does not use standard ceramics, but rather 3D-printed electro-active polymer (EAP) actuators to produce, with a higher time response (1 to 3 kHz), large, highly precise displacements in line with the needs of future instruments.
To develop
Our researchs
New generation of advanced technologies for hybrid and high-speed deformable mirrors.
- Combining additive manufacturing of electroactive polymers and self-supporting silicon membrane technology.
- Synergistic metrology and control of these high-dynamic deformable silicon mirrors will be developed using a new phase-shifting interferometric setup and static-mode shape and strain measurements followed by a new closed-loop, real-time, nanometer-resolved Mach-Zehnder interferometer.
Four key components of new technologies :
- Self-supporting silicon membranes with locally doped areas to be used for the first time as electrodes ;
- Active shape control with multi-degree-of-freedom force actuators via 3D printing for : a new electroactive polymer ;
- Phase-shifting interferometric bench for small-scale characterization and measurement of the shape and deformation of the optical aperture surface ;
- Rapid new metrology and control of the optical wavefront.
The consortium
CRAL/CNRS, LGEF INSA LYON, MINES St-Etienne, LAM/CNRS
… VISIONARY TECHNOLOGIES PAVE THE WAY FOR POWERFUL NEW INSTRUMENTS
- Astronomical systems ;
- Free-space optical wireless communication systems ;
- Light harvesting systems for clean solar energy production on Earth and in orbital solar farms ;
- Space surveillance of the Earth and near-Earth environments for safety and resources.
